/*
 *  Copyright 2008 Danny Lagrouw
 *  
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License. 
 */
package org.bastion.memory.service;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.bastion.query.Matcher;
import org.bastion.service.FindService;
import org.bastion.service.ObjectIdService;
import org.bastion.service.QueryService;
import org.bastion.service.RegisterService;

public class MemoryService implements RegisterService, FindService, QueryService, ObjectIdService {

	private final MemoryStore memoryStore;

	public MemoryService(MemoryStore memoryStore) {
		this.memoryStore = memoryStore;
	}

	public void register(Object object) {
		memoryStore.register(object);
	}

	public <T> T find(Class<T> clazz, Object key) {
        return memoryStore.find(clazz, key);
	}

	@Override
	public <T> List<T> executeQuery(Class<T> clazz) {
		return memoryStore.executeQuery(clazz);
	}

	@Override
	public Long generateId(Object object) {
		return memoryStore.generateId(object);
	}

	@Override
	public <T> List<T> executeQuery(Class<T> clazz, Matcher<T> matcher) {
		List<T> list = executeQuery(clazz);
		List<T> matches = new ArrayList<T>();
		for (T object : list) {
			if (matcher.match(object)) {
				matches.add(object);
			}
		}
		return matches;
	}

	@Override
	public <T> List<T> executeQuery(Class<T> clazz, String queryName,
			Map<String, Object> parameters) {
		throw new UnsupportedOperationException();
	}

	@Override
	public boolean prefersNamedQueries() {
		return false;
	}

	@Override
	public boolean prefersPredicateQueries() {
		return true;
	}

	@Override
	public boolean supportsNamedQueries() {
		return false;
	}

	@Override
	public boolean supportsPredicateQueries() {
		return true;
	}
	
}
